cosmu | e17a42d5e1a347c8f19658e279c11a10d9fb8d1a8455724ecaa30920f19d32f4

Analysis

max time kernel
150s
max time network
136s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
11/11/2026, 00:44

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General

Target
2026-11-09_266cec345ba876e005c1730f14cd8ff9_elex_wannacry.exe
Size 427KB
Sample261111-a3hgcss16k
SHA256 e17a42d5e1a347c8f19658e279c11a10d9fb8d1a8455724ecaa30920f19d32f4
MD5 266cec345ba876e005c1730f14cd8ff9
SHA1 bf4479f193b1ccdf321a011a6105dd7d53baceba
SHA512 b5cda5d80065d00e500333c34072f2f72312c18665a752225763ad533d630ed47bf5441513233252442a60ef92079d87008c5daaefcce6d9a722e7c8b577136f
SSDEEP 6144:0H8/GKewxm8wDFoO4BqJNbopdu8RYtCN9kdMMcfp73/xRkKy:G8/GK5wevQDoiIYtlMMcBxRkKy
TLSH
T1E8946B1C9B876E80CA8DA63450938F5D16F7152B7DB295AF972DF8390B23F6B408CD24
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery cosmu worm

Malware Config

Signatures

Family: Cosmu
Cosmu is a Windows worm written in C++.
worm cosmu

Detects Cosmu payload 2 IoCs

Cosmu is a worm written in C++.

resource	yara_rule
behavioral2/memory/2852-0-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu
behavioral2/memory/2852-2-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu

Custom signature

Detects executables packed with eXPressor 2 IoCs

resource	yara_rule
behavioral2/memory/2852-0-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor
behavioral2/memory/2852-2-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-11-09_266cec345ba876e005c1730f14cd8ff9_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-11-09_266cec345ba876e005c1730f14cd8ff9_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-11-09_266cec345ba876e005c1730f14cd8ff9_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2852

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k GPSvcGroup
1⤵
PID:1400

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2852-0-0x0000000000400000-0x000000000040A000-memory.dmp

Download

memory/2852-2-0x0000000000400000-0x000000000040A000-memory.dmp